A350452 - cp's OEIS frontend

A350452 Number T(n,k) of endofunctions on [n] with exactly k connected components and no fixed points; triangle T(n,k), n>=0, 0<=k<=floor(n/2), read by rows.

n	a(n)
0	1
1	0
2	0
3	1
4	0
5	8
6	0
7	78
8	3
9	0
10	944
11	80
12	0
13	13800
14	1810
15	15
16	0
17	237432
18	41664
19	840
20	0
21	4708144
22	1022252
23	34300
24	105
25	0
26	105822432
27	27098784
28	1286432
29	10080
30	0
31	2660215680
32	778128336
33	47790540
34	648900
35	945
36	0
37	73983185000
38	24165049920
39	1815578160
40	36048320
41	138600

[1, 0, 0, 1, 0, 8, 0, 78, 3, 0, 944, 80, 0, 13800, 1810, 15, 0, 237432, 41664, 840, 0, 4708144, 1022252, 34300, 105, 0, 105822432, 27098784, 1286432, 10080, 0, 2660215680, 778128336, 47790540, 648900, 945, 0, 73983185000, 24165049920, 1815578160, 36048320, 138600]

cp's OEIS Frontend

A350452 Number T(n,k) of endofunctions on [n] with exactly k connected components and no fixed points; triangle T(n,k), n>=0, 0<=k<=floor(n/2), read by rows.

Table of values

List of values